Coolant color is usually brand dependant, as long as it says hoat on the bottle it's fine.
.The check ball in the pcv valve should move freely So yea if you shake it, it should rattle. Just hose it down with some wd-40 till it does.
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In over 15 years of messing with Hemi's, I've never seen one that didn't rattle. I expect the other engines are about the same. IMO, the problem with them, at least the Hemi and probably the others too, ends up being the spring tension...it weakens over time and then doesn't do what it is suppose to do. I would speculate that this inexpensive valve is VERY RARELY changed by the average vehicle owner. I change them on my 3 Chrysler vehicles every 30K when I service the transmissions, differentials and transfer case.
It should also be noted that the Hemi's (and probably the other DCX/FCA vehicles) have about the worst vapor recovery systems of any modern vehicles. This is why a lot of "gearheads" (me included) highly recommend a catch can to catch most of the oil/condensation that would otherwise enter the combustion tract and cycle out the exhaust. I've seen the results first hand when I tore both of my early 5.7 Hemi's down to install all new valve seats. I bought my Hemi Magnum new and have run with a catch can and synthetic oil since about 5000 miles, and my Hemi Jeep was bought used (~49K on it at purchase) and it had been run without a catch can and with dino. oil. On disassembly, the intake ports of the Jeep heads were all gunked up with what looked like sticky crude oul and, when I did the Magnum, its intake ports were completely clean. So, IMO, I vote for both synthetic oil and catch cans. To add a little more to this, although it's directed to the Hemi's it applies to all Vapor Recovery Systems, Mike at Diablosport (a tuner manufacturer) said the following in one of his posts (on another forum) about the Hemi vapor recovery system:
"No, this is where I comment on lost power due to oil contamination in the intake tract/combustion chamber. I will assure you that after having seen as many logs of as many HEMIs as we have here at DiabloSport, not to mention the numerous HEMI vehicles we have had on our dyno for R&D, I can say, without a doubt, that the HEMI's PCV/Oil Vapor control is the worst of anything we deal with. All you have to do is pull your intake manifold to see the puddles of oil collected in there, and realize that it eventually gets in the combustion chamber, and oil don't like to burn, thus, detonation occurs.
There is no gimmick here. HEMI's have KR issues. The KR issues are 99% of the time contributed to by oil contamination in the intake charge, reducing the effective octane in the combustion chamber, and leading to a loss of performance.
Plenty of people have seen solid power gains on even stock vehicles when getting rid of an oil issue by adding a catch can that works properly."
So, again IMO, the vapor recovery systems on our vehicles are not a system to be ignored.